请教OPENSSL里生成的RSA密钥对如何存取

请问OPENSSL里生成的RSA密钥对怎么存取
如题,要保存在文件中,并能取出,该怎么做,有什么函数?

[解决办法]
以下是最简单的做法，欲了解详情，请在Linux下
man openssl，man rsa，man genrsa。

C/C++ code

# openssl genrsaGenerating RSA private key, 512 bit long modulus.........++++++++++++.............................++++++++++++e is 65537 (0x10001)-----BEGIN RSA PRIVATE KEY-----MIIBOgIBAAJBALeHSLCEUyjWsgHSfuisWUjbckupB0t0lLJkOEu/70CdlChfUjT+AisAf6aXGMbgpAYWSo7Uj09o+3iuf8dfxiMCAwEAAQJAZKGyUs+LxaXLX0JrQetW3aMuTZw2GsKm0hYv5CEu7+9J2elOOHjjid43o/pf9ZVUmlLDr4RnnXlBwUGDUen9yQIhANqecJlS7viaMFdKPutitnDnX1To1bpEPMrx894WaqdVAiEA1ujWQ8CTRcIDVSl411dReQtT5pChR3vpENtIFMTUx5cCIAm5UGLReIWgPhQz3jaUDm9ZKzlYneEKFfYk6ubu8lF9AiEAqMps5v/Ma8CKv4t4FqHFIq3L8s3rbeqbThr8DRvfBvcCIAnmnWWadezARuf7phafeK2Vl1TiNXJXTfN1tPebNIJO-----END RSA PRIVATE KEY-----